Problems with the material
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This post was last edited by Two pieces of ice on 2009-9-23 at 11:31. What are the differences between 16Mn and 16MnR materials? The main differences lie in their composition and mechanical properties
The poster is asking whether 16Mn refers to pipe material or forged products, as the strength parameters for the two are different. 16MnR is used for containers, with a minimum tensile strength of 460 MPa and a yield strength of 285 MPa.
16MnR is a steel used for containers, while 16Mn is a steel used for structures.
16Mn is available in both tube form and forged products, while 16MnR is used as sheet material for pressure vessels; they are applied in different contexts
3# wolf806 For example, we are currently using 16Mn forged steel for flanges – why use structural steel instead?
16Mn is a structural steel, while 16MnR is a steel used for containers.
It was already mentioned upstairs that 16Mn is used for structural purposes, while 16MnR is used for containers. But the fundamental difference lies in the higher requirements regarding the levels of P and S; since steel used for containers needs to have better toughness, elements like P and S, which can cause cold or hot brittleness in materials, must be strictly controlled. In the new steel plate standard GB713-2007, the upper limits for P and S in 16MnR are 0.025 and 0.015 respectively. The poster can check against the structural steel standards to see the differences
There’s no more 16MnR these days; it’s all Q345R now.
16MnR is a steel used for containers, while 16Mn is a steel used for structural applications. Their chemical compositions are the same, but their supply conditions and areas of application differ.